WO2019200906A1 - 触控平板控制电路和触控平板 - Google Patents

触控平板控制电路和触控平板 Download PDF

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Publication number
WO2019200906A1
WO2019200906A1 PCT/CN2018/115965 CN2018115965W WO2019200906A1 WO 2019200906 A1 WO2019200906 A1 WO 2019200906A1 CN 2018115965 W CN2018115965 W CN 2018115965W WO 2019200906 A1 WO2019200906 A1 WO 2019200906A1
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WIPO (PCT)
Prior art keywords
touch
interface
transmission interface
signal
touch panel
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PCT/CN2018/115965
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English (en)
French (fr)
Inventor
邱伟波
杨起源
Original Assignee
广州视源电子科技股份有限公司
广州视睿电子科技有限公司
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Application filed by 广州视源电子科技股份有限公司, 广州视睿电子科技有限公司 filed Critical 广州视源电子科技股份有限公司
Priority to EP18915586.4A priority Critical patent/EP3767439B1/en
Priority to US17/043,411 priority patent/US11226701B2/en
Priority to ES18915586T priority patent/ES2910119T3/es
Publication of WO2019200906A1 publication Critical patent/WO2019200906A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0042—Universal serial bus [USB]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/20—Details of the management of multiple sources of image data

Definitions

  • the present disclosure relates to the field of touch input technologies, for example, to a touch panel control circuit and a touch panel.
  • Touch panels with large screens and human-computer interaction have been widely used in multi-person interaction scenarios such as teaching scenes and conference scenes.
  • some touch panels are also equipped with a signal source interface, allowing access to multiple signal sources, such as accessing an external computer device, displaying the display screen of the external computer device on the touch panel, and The user can operate the display screen of the external computer device on the touch panel; or access a computer module with a separate operating system, so that the touch panel has a dual system operation interface.
  • the touch input device of the touch panel (such as an infrared touch frame or an electromagnetic screen) needs to send touch coordinate information to the main chip and the signal source respectively, so that the main chip
  • the main system function such as a menu for calling up the switching channel or configuring display attributes may be implemented in response to the touch coordinate information, and the added signal source may also implement the operation indicated by the user's touch action in response to the touch coordinate information.
  • the touch input device further needs to respond to the command of the main chip to differentiate the transmission of the touch coordinate information on the two channels. For example, when the menu of the switching channel is called, the signal source should be prohibited from responding to the menu area. Corresponding touch coordinate information.
  • the universal touch input device often has only one signal output interface.
  • a touch input device supplier is required to cooperate, an output interface is added, and an interface protocol is customized to realize diversified processing of touch coordinate information transmission, and the touch is increased. Control the development process of the tablet and the cost is high.
  • the present disclosure provides a touch panel control circuit and a touch panel capable of simplifying the development process of the touch panel and reducing the cost by using a universal touch input device.
  • the present disclosure provides a touch panel control circuit including: a touch switching module, a main chip, and a signal source interface;
  • the touch switching module includes an input interface, a first transmission interface, and a second transmission interface; the main chip includes a touch information transmission interface;
  • the input interface of the touch switching module is configured to connect an output interface of the touch input device, and receive a first touch coordinate signal sent by the touch input device from the output interface;
  • the first transmission interface of the touch switching module is connected to the touch information transmission interface of the main chip; the second transmission interface of the touch switching module is connected to the signal source interface; Receiving, by the first transmission interface, a signal distribution instruction sent by the main chip from the touch information transmission interface, and transmitting, according to the signal distribution instruction, the first transmission interface and/or the second transmission interface A second touch coordinate signal corresponding to the touch coordinate signal.
  • the present disclosure provides a touch panel including a touch input device and a touch panel control circuit provided by any embodiment
  • the touch input device includes an output interface, and the output interface is connected to an input interface of the touch transition module in the touch panel control circuit.
  • the disclosure adds a touch switching module to the touch panel control circuit, and the touch switching module receives the first touch coordinate signal sent by the touch input device and the signal distribution instruction sent by the main chip, and completes the external signal according to the signal distribution instruction.
  • the source and/or the main chip distributes the function of the touch coordinate signal, that is, the touch switching module can realize the expansion of the transmission interface, complete the function of transmitting the touch coordinate signal to the two channels, and can also customize the interface protocol on the touch switching module. Realizing the transmission of touch coordinate signals according to the signal distribution instruction, solving the problem that the output interface needs to be added on the touch input device and the interface protocol is customized, the development process of the touch panel is increased and the cost is high, and the universal touch input device can be used to simplify the touch. Control the development process of the tablet and reduce the cost.
  • FIG. 1 is a schematic structural diagram of a touch panel control circuit according to an embodiment
  • FIG. 2 is a schematic structural diagram of a touch panel control circuit according to another embodiment
  • FIG. 3 is a schematic structural diagram of a touch switching module according to an embodiment
  • FIG. 4 is a schematic structural diagram of a touch panel provided by an embodiment.
  • FIG. 1 is a schematic structural diagram of a touch panel control circuit according to an embodiment.
  • the touch panel control circuit 10 includes a touch switching module 11, a main chip 13, and a signal source interface 12.
  • the touch switching module 11 includes an input interface A, a first transmission interface B1, and a second transmission interface B2; the main chip 13 includes a touch information transmission interface E.
  • the input interface A of the touch transition module 11 sets an output interface that connects the touch input device 20, and receives a first touch coordinate signal that the touch input device 20 transmits from the output interface.
  • the first transmission interface B1 of the touch switching module 11 is connected to the touch information transmission interface E of the main chip 13; the second transmission interface B2 of the touch switching module 11 is connected to the signal source interface 12.
  • the touch switching module 11 is configured to receive, from the first transmission interface B1, a signal distribution instruction sent by the main chip 13 from the touch information transmission interface E, and according to the signal distribution instruction, from the first transmission interface B1 and/or the second transmission interface B2 Sending a second touch coordinate signal corresponding to the first touch coordinate signal.
  • the signal source interface 12 is configured to connect to the signal source 30.
  • the signal source interface is configured to be pluggably connected to an external computer module or wirelessly connected to an external computer terminal, that is, the touch transition module 11 sends a second touch.
  • the coordinate signals are sent to the main chip 13 and/or these signal sources 30 to enable the main chip 13 and/or the signal source 30 to respond to touch operations performed by the user on the touch input device 20.
  • transmitting the second touch coordinate signal corresponding to the first touch coordinate signal from the first transmission interface B1 and/or the second transmission interface B2 according to the signal distribution instruction may include at least one of the following operations:
  • the second touch coordinate signal is transmitted from the first transmission interface B1 and/or the second transmission interface B2.
  • the second touch coordinate signal determines whether the second touch coordinate signal needs to be output, for example, an operating system or a signal source system provided by the main chip 13 sets an area on the touch panel as a specific functional area, and the functional area is not Receiving the touch input, it is necessary to shield the transmission of the touch coordinate signal on the area to the main chip 13 or the signal source 30, and the touch switching module 11 determines whether to output the second touch coordinate signal according to the regional coordinate range specified by the signal distribution instruction. And in the case of determining that the second touch coordinate signal needs to be output, the second touch coordinate signal is transmitted from the first transmission interface B1 and/or the second transmission interface B2 according to the signal distribution instruction.
  • the main chip 13 needs to respond to the second touch coordinate signal, and needs to distribute the second touch coordinate signal to the main chip 13; when the signal distribution instruction indicates that the display channel of the current touch panel is the signal source channel That is, the current touch panel displays the video image output by the external source system, for example, displaying a video screen of another operating system provided by the computer module connected to the touch panel, or displaying a video provided by an external computer wirelessly connected to the touch panel.
  • the second touch coordinate signal needs to be distributed to the main chip 13 and the current signal source channel, so that the main chip 13 can respond to the second touch coordinate information to implement a main system function such as a menu for calling up the switching channel or configuring display attributes.
  • the signal source 30 can also implement the user's touch action in response to the touch coordinate information.
  • the signal distribution instruction indicates that the display channel of the current touch panel is the source channel, but the on-screen display (OSD) switch is turned on, and the user is on the OSD switch that is called by the main system.
  • OSD on-screen display
  • the signal source 30 corresponding to the display channel is triggered to perform an operation, for example, if the whiteboard is opened on the source system In the software, the selection of the menu option on the OSD switch causes the handwriting corresponding to the user's touch track to appear on the whiteboard software.
  • the touch operation of the signal source channel needs to be shielded, and the touch coordinate signal is only transmitted to the main chip 13.
  • the second touch coordinate signal is transmitted from the interface corresponding to the distribution object to the distribution object, wherein the distribution object is at least one of the main chip 13 and the signal source interface 12.
  • the touch switching module 11 includes a first Micro Control Unit (MCU) (not shown).
  • the first MCU is configured to determine an interface for outputting the second touch coordinate signal from the first transmission interface and the second transmission interface according to the signal distribution instruction.
  • the first MCU is configured to determine whether to output the second touch coordinate signal according to the signal distribution instruction. In an embodiment, the first MCU is further configured to determine an output from the first transmission interface B1 and the second transmission interface B2 according to the signal distribution instruction, when determining to output the second touch coordinate signal An interface of the second touch coordinate signal.
  • the first MCU is further configured to convert the first touch coordinate signal into a second touch coordinate signal according to the preset coordinate conversion algorithm according to the signal distribution instruction.
  • the technical solution of the embodiment adds a touch switching module to the touch panel control circuit, and the touch switching module receives the first touch coordinate signal sent by the touch input device and the signal distribution instruction sent by the main chip.
  • the function of distributing the touch coordinate signal to the external signal source and/or the main chip is completed, that is, the touch switching module can realize the expansion of the transmission interface and complete the function of transmitting the touch coordinate signal to the two channels, and can also Customizing the interface protocol on the touch-transfer module to realize the transmission of the touch coordinate signal according to the signal distribution instruction, solving the problem that the output interface needs to be added on the touch input device and the interface protocol is customized, the development process of the touch panel is increased, and the cost is high.
  • the ability to use a universal touch input device simplifies the development process of the touch panel and reduces the cost.
  • the touch panel control circuit includes a touch switching module 11, a main chip 13, and a signal source interface 12.
  • the touch switching module 11 includes an input interface, a first transmission interface B1 and a second transmission interface B2; and the main chip 13 includes a touch information transmission interface E.
  • the input interface of the touch transition module 11 is configured to connect the output interface of the touch input device 20, and receive the first touch coordinate signal transmitted by the touch input device 20 from the output interface.
  • the first transmission interface B1 of the touch switching module 11 is connected to the touch information transmission interface E of the main chip 13; the second transmission interface B2 of the touch switching module 11 is connected to the signal source interface 12.
  • the touch switching module 11 is configured to receive, from the first transmission interface B1, a signal distribution instruction sent by the main chip 13 from the touch information transmission interface E, and according to the signal distribution instruction, from the first transmission interface B1 and/or the second transmission interface B2 Sending a second touch coordinate signal corresponding to the first touch coordinate signal.
  • the touch panel control circuit includes a plurality of signal source interfaces 12.
  • the plurality of signal source interfaces 12 may include a computer module independently of the main chip 13 in the touch panel.
  • An interface for touching a coordinate signal (a personal computer (PC) module interface 121 or an Android module interface 122), configured to wirelessly connect a wireless projector to obtain a video of an external computer to which the wireless projector is connected
  • the signal and the transmitted touch coordinate signal are transmitted to the wireless transceiver module 123 of the external computer and other signal source interfaces 124.
  • the plurality of signal source interfaces 12 are merely exemplary. Those skilled in the art can customize the signal source interface 12 to at least one of the plurality of signal source interfaces according to the user group facing the touch panel.
  • the touch panel control circuit further includes a second switch 15; the second switch 15 includes a second input end. C2 and a plurality of third output terminals D3; the second switch switch 15 is connected between the second transmission interface B2 of the touch switching module 11 and the plurality of signal source interfaces 12, wherein the second input terminal C2 is connected to the second transmission interface B2.
  • the plurality of third output terminals D3 are connected to the plurality of signal source interfaces 12 in one-to-one correspondence.
  • the switch is a switch device that selects an output terminal according to the signal of the control terminal, and connects the output terminal and the input terminal.
  • the second switch 15 implements a pair of the touch transition module 11 and the signal source interface 12. More connections.
  • the switch that is set to transmit the selected touch coordinate signal is also set to select the switch of the current display channel. Therefore, the control end of the second switch 15 should receive the channel switch command.
  • the touch panel control circuit further includes a second MCU 14.
  • the second MCU 14 includes a first extension end, a second extension end, and a third extension end; the second MCU 14 is connected to the touch information of the first transmission interface B1 of the touch switching module 11 and the main chip 13. Between the transmission interface E, the first extension end is connected to the first transmission interface B1, and the second extension end is connected to the touch information transmission interface E.
  • the second switch 15 further includes a second control end G2, and the third extension end is set as an output.
  • the third switching terminal 15 is connected to the second control terminal G2, and the second switching switch 15 is configured to determine the third output terminal D3 connected to the second input terminal C2 according to the channel switching instruction received by the second control terminal G2.
  • the second MCU 14 functions as a connection component to implement interface expansion of the data exchanged between the main chip 13 and the touch switching module 11 and the second switching switch 15.
  • the third extension can be controlled according to the instruction output by the main chip 13.
  • the terminal outputs a channel switching instruction to control the second switching switch 15 to implement display channel switching.
  • the second MCU 14 can also be connected to the channel switching button set on the touch panel, write a program in the second MCU 14, and output a channel switching instruction according to the level signal triggered by the channel switching button, which can be specifically The functional requirements of the touch panel are customized.
  • the first extension end and the first transmission interface B1 are Universal Asynchronous Receiver/Transmitter (UART) interfaces
  • the second extension end and the touch information transmission interface E are The Universal Serial Bus (USB) interface
  • the second input terminal C2 and the second transmission interface B2 are USB interfaces.
  • FIG. 3 is a schematic structural diagram of the touch switching module 11 in this embodiment.
  • the touch switching module 11 includes a first MCU 111, and further includes a first switching switch 112 and a hub 113.
  • the first switching switch 112 includes a first control.
  • the first touch coordinate signal After the first touch coordinate signal enters the touch switching module 11 from the input interface A, the first touch coordinate signal can be selected by one of the two branches, and the other is the second output terminal D2 of the first switch 112.
  • the input device connection to the first MCU 111 is processed by the first MCU 111 from the main chip connection end of the first MCU 111 (connecting the first transmission interface B1) and/or the signal source connection (connecting the second transmission through the hub 113)
  • the interface B2) outputs the second touch coordinates.
  • the processing of the first touch coordinate signal by the first MCU 111 can refer to the above embodiment, and the signal processing can satisfy the functional requirements of the touch switching module 11 in any embodiment of the present disclosure.
  • the other way is that the first output terminal D1 of the first switch 112 is outputted through the second transmission interface B2 via the hub 113, that is, without any processing, which is equivalent to not providing the touch switching module 11, so that the universal touch can be completed.
  • the debugging or upgrading of the input device expands the diversified processing of the touch coordinate signals input by the touch input device, and also ensures the debugging or upgrading function of the universal touch input device.
  • the technical solution of the embodiment adds a touch switching module to the touch panel control circuit, and the touch switching module receives the first touch coordinate signal sent by the touch input device and the signal distribution instruction sent by the main chip.
  • the function of distributing the touch coordinate signal to the external signal source and/or the main chip is completed, that is, the touch switching module can realize the expansion of the transmission interface and complete the function of transmitting the touch coordinate signal to the two channels, and can also
  • the interface protocol is customized on the touch-transfer module to transmit the touch coordinate signal according to the signal distribution instruction, which solves the problem that the output interface needs to be added on the touch input device and the interface protocol is customized, and the development process of the touch panel is increased and the cost is high.
  • the realization of the use of a universal touch input device simplifies the development process of the touch panel and reduces the cost.
  • the touch panel includes a touch input device 20 and a touch panel control circuit 10 provided by any embodiment of the present disclosure; the touch input device 20 includes an output interface, and the output interface is connected to the input of the touch transition module 11 in the touch panel control circuit 10 interface.
  • the touch panel further includes a signal source 30.
  • the signal source interface of the touch switching module 11 includes a PC module interface 121 and an Android module interface 122.
  • the signal source 30 includes a pluggable connection on the PC module interface 121.
  • the PC module 31 and the Android module 32 that is pluggable and connected to the Android module interface 122.
  • the touch input device 20 is a capacitive touch panel, an infrared touch frame, or an electromagnetic screen.
  • the touch panel provided in this embodiment includes the touch panel control circuit provided in the first embodiment or the second embodiment, and therefore has corresponding beneficial effects.
  • first or second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining “first” or “second” may include at least one feature, either explicitly or implicitly.

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  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Computer Hardware Design (AREA)
  • Position Input By Displaying (AREA)
  • User Interface Of Digital Computer (AREA)

Abstract

一种触控平板控制电路（10）和触控平板。该触控平板控制电路包括：触摸转接模块（11）、主芯片（13）和信号源接口（12）；触摸转接模块（11）的输入接口（A）设置为连接触摸输入设备（20）的输出接口，接收触摸输入设备（20）从输出接口发送的第一触摸坐标信号；触摸转接模块（11）的第一传输接口（B1）连接主芯片（13）的触摸信息传输接口（E）；触摸转接模块（11）的第二传输接口（B2）连接信号源接口（12）；触摸转接模块（11）设置为从第一传输接口（B1）接收主芯片（13）从触摸信息传输接口（E）发送的信号分发指令，并根据信号分发指令，从第一传输接口（B1）和第二传输接口（B2）中的至少一个发送与第一触摸坐标信号对应的第二触摸坐标信号。

Description

触控平板控制电路和触控平板
本公开要求在2018年04月16日提交中国专利局、申请号为201810339498.2的中国专利申请的优先权，该申请的全部内容通过引用结合在本公开中。
技术领域
本公开涉及触摸输入技术领域，例如涉及一种触控平板控制电路和触控平板。
背景技术
具有大屏幕且可实现人机交互的触控平板在教学场景和会议场景等多人交互的场景得到了广泛的应用。为了适应这些场景下的多功能需求，部分触控平板还配备信号源接口，允许接入多个信号源，例如接入外部计算机设备，将外部计算机设备的显示画面展示在触控平板上，且用户可在触控平板上对外部计算机设备的显示画面进行操作；或者接入一个具有独立操作系统的计算机模块，使触控平板具有双系统操作界面。
当用户将触控平板的显示通道切换到增设的信号源通道时，触控平板的触摸输入设备(例如红外触摸框或电磁屏)需要向主芯片和信号源分别发送触摸坐标信息，使得主芯片可以响应触摸坐标信息实现诸如调出切换信道的菜单或配置显示属性等主系统功能，增设的信号源也可以响应触摸坐标信息实现用户触摸动作所指示的操作。在一实施例中，触摸输入设备还需要响应主芯片的命令，对触摸坐标信息在两路信道上的传输做区别化处理，例如在调出切换信道的菜单时，应当禁止信号源响应菜单区域所对应的触摸坐标信息。
然而，通用的触摸输入设备，往往只有一个信号输出接口，开发多通道触控平板，需要触摸输入设备供应商配合，增设输出接口并定制接口协议以实现触摸坐标信息传输的多样化处理，增加触控平板的开发流程且成本较高。
发明内容
本公开提供一种触控平板控制电路和触控平板，能够使用通用的触摸输入设备，简化触控平板的开发流程且降低成本。
本公开提供了一种触控平板控制电路，包括：触摸转接模块、主芯片和信号源接口；
所述触摸转接模块包括输入接口、第一传输接口和第二传输接口；所述主芯片包括触摸信息传输接口；
所述触摸转接模块的输入接口设置为连接触摸输入设备的输出接口，接收所述触摸输入设备从输出接口发送的第一触摸坐标信号；
所述触摸转接模块的第一传输接口连接所述主芯片的触摸信息传输接口；所述触摸转接模块的第二传输接口连接所述信号源接口；所述触摸转接模块设置为从所述第一传输接口接收所述主芯片从触摸信息传输接口发送的信号分发指令，并根据所述信号分发指令，从所述第一传输接口和/或所述第二传输接口发送与所述第一触摸坐标信号对应的第二触摸坐标信号。
本公开提供一种触控平板，所述触控平板包括触摸输入设备和任意实施例提供的触控平板控制电路；
所述触摸输入设备包括输出接口，所述输出接口连接所述触控平板控制电路中的触摸转接模块的输入接口。
本公开通过在触控平板控制电路中增加触摸转接模块，触摸转接模块接收触摸输入设备发送的第一触摸坐标信号以及主芯片发送的信号分发指令，根据信号分发指令，完成向外接的信号源和/或主芯片分发触摸坐标信号的功能，即触摸转接模块既能实现传输接口的扩展，完成触摸坐标信号向两路信道传输的功能，也能在触摸转接模块上定制接口协议以实现根据信号分发指令传输触摸坐标信号，解决需要在触摸输入设备上增设输出接口并定制接口协议，增加触控平板的开发流程且成本较高的问题，实现能够使用通用的触摸输入设备，简化触控平板的开发流程且降低成本的效果。
附图说明
图1是一实施例提供的触控平板控制电路的结构示意图；
图2是另一实施例提供的触控平板控制电路的结构示意图；
图3是一实施例提供的触摸转接模块的结构示意图；
图4是一实施例提供的触控平板的结构示意图。
具体实施方式
下面结合附图和实施例对本公开进行说明。此处所描述的实施例仅仅用于解释本公开，而非对本公开的限定。另外，为了便于描述，附图中仅示出了与本公开相关的部分而非全部结构。
实施例一
图1是一实施例提供的触控平板控制电路的结构示意图。该触控平板控制电路10包括触摸转接模块11、主芯片13和信号源接口12。触摸转接模块11包括输入接口A、第一传输接口B1和第二传输接口B2；主芯片13包括触摸信息传输接口E。
触摸转接模块11的输入接口A设置连接触摸输入设备20的输出接口，接收触摸输入设备20从输出接口发送的第一触摸坐标信号。触摸转接模块11的第一传输接口B1连接主芯片13的触摸信息传输接口E；触摸转接模块11的第二传输接口B2连接信号源接口12。触摸转接模块11设置为从第一传输接口B1接收主芯片13从触摸信息传输接口E发送的信号分发指令，并根据该信号分发指令，从第一传输接口B1和/或第二传输接口B2发送与第一触摸坐标信号对应的第二触摸坐标信号。在一实施例中，信号源接口12设置为连接信号源30，例如信号源接口设置为可插拔地连接外置的计算机模块或无线连接外部计算机终端，即触摸转接模块11发送第二触摸坐标信号到主芯片13和/或这些信号源30，以使主芯片13和/或信号源30能够响应用户在触摸输入设备20上执行的触摸操作。
在一实施例中，根据信号分发指令，从第一传输接口B1和/或第二传输接口B2发送与第一触摸坐标信号对应的第二触摸坐标信号，可包括如下操作中的至少一项：
(1)根据信号分发指令，按照预设的坐标转换算法，将第一触摸坐标信号转换为第二触摸坐标信号，或者，以第一触摸坐标信号作为第二触摸坐标信号，并根据信号分发指令从第一传输接口B1和/或第二传输接口B2发送第二触摸坐标信号。
(2)根据信号分发指令，确定第二触摸坐标信号是否需要输出，例如通过主芯片13提供的操作系统或信号源系统设置了触控平板上某个区域作为特定的功能区域，该功能区域不接收触摸输入，则需要屏蔽该区域上的触摸坐标信号向主芯片13或信号源30的传输，触摸转接模块11根据信号分发指令指定的区域坐标范围，判断是否输出第二触摸坐标信号。并在确定需要输出第二触摸坐标信号的情况下，根据信号分发指令从第一传输接口B1和/或第二传输接口B2发送第二触摸坐标信号。
(3)根据信号分发指令，确定第二触摸坐标信号要分发到主芯片13还是信号源接口12，例如，当信号分发指令指示当前触控平板的显示通道为主芯片通道，即当前触控平板显示主操作系统输出的视频画面，则主芯片13需要响应第二触摸坐标信号，需要将第二触摸坐标信号分发到主芯片13；当信号分发指令指示当前触控平板的显示通道为信号源通道，即当前触控平板显示外接的信号源系统输出的视频画面，例如显示触控平板所接的计算机模块提供的另一个操作系统的视频画面，或者显示无线连接触控平板的外部计算机提供的视频画面，则需要分发第二触摸坐标信号到主芯片13和当前的信号源通道，使得主芯片13可以响应第二触摸坐标信息以实现诸如调出切换信道的菜单或配置显示属性等主系统功能，信号源30也可以响应触摸坐标信息实现用户触摸动作所指示的操作；或者，当信号分发指令指示当前触控平板的显示通道为信号源通道，但屏幕菜单式调节(on-screen display，OSD)开关打开，此时用户在主系统调出的OSD开关上进行菜单选项的选择时，相应的触摸操作所对应的触摸坐标信号若传输到当前的显示通道，则会触发该显示通道对应的信号源30执行操作，例如如果在该信号源系统上打开了白板软件，则对OSD开关上菜单选项的选择会导致白板软件上出现与用户触摸轨迹对应的笔迹，为了避免这种情况，需要屏蔽信号源通道的触摸操作，触摸坐标信号仅传输到主芯片13。并在确定分发对象后，将第二触摸坐标信号从分发对象对应的接口传输给分发对象，其中，分发对象为主芯片13和信号源接口12中至少一个。
为了使触摸转接模块11能够实现上述功能，一种实施方式是触摸转接模块11包括第一微控制单元(Microcontroller Unit，MCU)(图中未示出)。该第一MCU设置为根据所述信号分发指令，从第一传输接口和第二传输接口中确定输出所述第二触摸坐标信号的接口。
在一实施例中，该第一MCU设置为根据所述信号分发指令，判断是否输出所述第二触摸坐标信号。在一实施例中，该第一MCU还设置为：在确定输出所述第二触摸坐标信号的情况下，根据所述信号分发指令，从第一传输接口B1和第二传输接口B2中确定输出所述第二触摸坐标信号的接口。
在一实施例中，该第一MCU还设置为根据所述信号分发指令，按照预设的坐标转换算法，将所述第一触摸坐标信号转换为第二触摸坐标信号。
综上所述，本实施例的技术方案，通过在触控平板控制电路中增加触摸转接模块，触摸转接模块接收触摸输入设备发送的第一触摸坐标信号以及主芯片发送的信号分发指令，根据信号分发指令，完成向外接的信号源和/或主芯片分发触摸坐标信号的功能，即触摸转接模块既能实现传输接口的扩展，完成触摸坐标信号向两路信道传输的功能，也能在触摸转接模块上定制接口协议以实现根据信号分发指令传输触摸坐标信号，解决需要在触摸输入设备上增设输出接口并定制接口协议，增加触控平板的开发流程且成本较高的问题，实现能够使用通用的触摸输入设备，简化触控平板的开发流程且降低成本的效果。
实施例二
图2是另一实施例提供的触控平板控制电路的结构示意图。该触控平板控制电路包括触摸转接模块11、主芯片13和信号源接口12。触摸转接模块11包括输入接口、第一传输接口B1和第二传输接口B2；主芯片13包括触摸信息传输接口E。触摸转接模块11的输入接口设置为连接触摸输入设备20的输出接口，接收触摸输入设备20从输出接口发送的第一触摸坐标信号。触摸转接模块11的第一传输接口B1连接主芯片13的触摸信息传输接口E；触摸转接模块11的第二传输接口B2连接信号源接口12。触摸转接模块11设置为从第一传输接口B1接收主芯片13从触摸信息传输接口E发送的信号分发指令，并根据该信号分发指令，从第一传输接口B1和/或第二传输接口B2发送与第一触摸坐标信号对应的第二触摸坐标信号。
在一实施例中，触控平板控制电路包括多个信号源接口12，如图2所示，多个信号源接口12可以包括触控平板中与主芯片13相互独立的计算机模块的设置为获取触摸坐标信号的接口(个人计算机(Personal Computer，PC)模块接口121或安卓(Android)模块接口122)、设置为通过无线方式连接无线投屏 器以获得无线投屏器所连接的外部计算机的视频信号以及传输触摸坐标信号到所述外部计算机的无线收发模组123和其他信号源接口124。上述多个信号源接口12仅是示例性的，本领域技术人员可根据触控平板所面向的用户群体定制信号源接口12为上述多个信号源接口中的至少一种。为了使触摸转接模块11的第二传输接口B2与多个信号源接口12连接，本实施例中，触控平板控制电路还包括第二切换开关15；第二切换开关15包括第二输入端C2和多个第三输出端D3；第二切换开关15连接于触摸转接模块11的第二传输接口B2和多个信号源接口12之间，其中，第二输入端C2连接第二传输接口B2，多个第三输出端D3与所述多个信号源接口12一一对应连接。切换开关是一种根据控制端的信号选定一个输出端，连接该输出端和输入端的开关器件，在本实施例中，第二切换开关15实现触摸转接模块11和信号源接口12的一对多连接。
在一实施例中，设置为选定触摸坐标信号传输的切换开关也即设置为选择当前显示通道的切换开关，因此，第二切换开关15的控制端应当接收通道切换指令。由于主芯片13的接口数量有限，因此，在本实施例中，触控平板控制电路还包括第二MCU 14。在一实施例中，第二MCU 14包括第一扩展端、第二扩展端和第三扩展端；第二MCU 14连接于触摸转接模块11的第一传输接口B1和主芯片13的触摸信息传输接口E之间，其中，第一扩展端连接第一传输接口B1，第二扩展端连接触摸信息传输接口E；第二切换开关15还包括第二控制端G2，第三扩展端设置为输出通道切换指令，第三扩展端连接第二控制端G2，第二切换开关15设置为根据第二控制端G2接收到的通道切换指令确定所述第二输入端C2连接的第三输出端D3。本实施例中，第二MCU 14作为连接部件，实现了主芯片13与触摸转接模块11、第二切换开关15交互数据的接口扩展，同时，可根据主芯片13输出的指令控制第三扩展端输出通道切换指令以控制第二切换开关15，实现显示通道切换。在其他实施例中，第二MCU 14也可以连接触控平板上设置的通道切换按键，在第二MCU 14中写入程序，根据通道切换按键触发的电平信号输出通道切换指令，具体可根据触控平板的功能需求定制。
在一实施例中，如图2所示，第一扩展端和第一传输接口B1为通用异步收发传输器(Universal Asynchronous Receiver/Transmitter，UART)接口，第二扩展端和触摸信息传输接口E为通用串行总线(Universal Serial Bus，USB)接口， 第二输入端C2和第二传输接口B2为USB接口。
本实施例还提供一种触摸转接模块11的实现方案，使得触摸转接模块11能够完成上述功能要求，同时不影响触摸输入设备的升级调试。参见图3，图3是本实施例中触摸转接模块11的结构示意图，触摸转接模块11包括第一MCU111，还包括第一切换开关112和集线器113；第一切换开关112包括第一控制端G1、第一输入端C1、第一输出端D1和第二输出端D2；集线器113包括第一接入端、第二接入端和接出端；第一MCU 111包括输入设备连接端、切换开关连接端、主芯片连接端和信号源连接端；触摸转接模块11还设置为从第一传输接口B1接收主芯片13从触摸信息传输接口E发送的支路切换指令；第一MCU 111的主芯片连接端连接第一传输接口B1(实现连接主芯片13)；第一MCU 111还设置为根据所述支路切换指令从切换开关连接端输出设定信号，切换开关连接端连接第一切换开关112的第一控制端G1；第一切换开关112设置为根据第一控制端G1接收到的设定信号确定第一输入端C1连接第一输出端D1或第二输出端D2；第一输入端C1连接触摸转接模块11的输入接口A；第一输出端D1连接集线器113的第一接入端；第二输出端D2连接第一MCU 111的输入设备连接端(实现第一MCU 111连接触摸输入设备)，第一MCU 111的信号源连接端连接集线器113的第二接入端，集线器113的接出端连接触摸转接模块11的第二传输接口B2。
通过上述的连接结构设置，第一触摸坐标信号由输入接口A进入触摸转接模块11后，可选择由两路支路中的一路进行处理，一路为第一切换开关112的第二输出端D2至第一MCU 111的输入设备连接端，由第一MCU 111处理后从第一MCU111的主芯片连接端(连接第一传输接口B1)和/或信号源连接端(通过集线器113连接第二传输接口B2)输出第二触摸坐标。在一实施例中，第一MCU 111对第一触摸坐标信号的处理可参考上述实施例，这一路信号处理能够满足本公开任意实施例中触摸转接模块11的功能要求。另一路为第一切换开关112的第一输出端D1经集线器113后通过第二传输接口B2输出，即不经任何处理，相当于不设有触摸转接模块11，因此可以完成对通用的触摸输入设备的调试或者升级，在扩展了对触摸输入设备输入的触摸坐标信号的多样化处理的同时，还保障了对通用的触摸输入设备的调试或升级功能。
本实施例触控平板控制电路的其他技术特征可参考上述实施例中的相应设 置，在此不再赘述。
综上所述，本实施例的技术方案，通过在触控平板控制电路中增加触摸转接模块，触摸转接模块接收触摸输入设备发送的第一触摸坐标信号以及主芯片发送的信号分发指令，根据信号分发指令，完成向外接的信号源和/或主芯片分发触摸坐标信号的功能，即触摸转接模块既能实现传输接口的扩展，完成触摸坐标信号向两路信道传输的功能，也能在触摸转接模块上定制接口协议以实现根据信号分发指令传输触摸坐标信号，解决了需要在触摸输入设备上增设输出接口并定制接口协议，增加触控平板的开发流程且成本较高的问题，实现能够使用通用的触摸输入设备，简化触控平板的开发流程且降低成本的效果。
实施例三
图4是一实施例中的触控平板的结构示意图。该触控平板包括触摸输入设备20和本公开任意实施例提供的触控平板控制电路10；触摸输入设备20包括输出接口，输出接口连接触控平板控制电路10中的触摸转接模块11的输入接口。
在一实施例中，触控平板还包括信号源30，触摸转接模块11的信号源接口包括PC模块接口121和Android模块接口122，信号源30包括可插拔连接在PC模块接口121上的PC模块31以及可插拔连接在Android模块接口122上的Android模块32。
在一实施例中，触摸输入设备20为电容屏触摸框、红外触摸框或电磁屏。
本实施例提供的触控平板包括实施例一或实施例二提供的触控平板控制电路，因此，具备相应的有益效果。
术语“第一”或“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”或“第二”的特征可以明示或者隐含地包括至少一个该特征。

Claims (10)

  1. 一种触控平板控制电路，包括：触摸转接模块、主芯片和信号源接口；
    所述触摸转接模块包括输入接口、第一传输接口和第二传输接口；所述主芯片包括触摸信息传输接口；
    所述触摸转接模块的输入接口设置为连接触摸输入设备的输出接口，接收所述触摸输入设备从所述输出接口发送的第一触摸坐标信号；
    所述触摸转接模块的第一传输接口连接所述主芯片的触摸信息传输接口；所述触摸转接模块的第二传输接口连接所述信号源接口；所述触摸转接模块设置为从所述第一传输接口接收所述主芯片从所述触摸信息传输接口发送的信号分发指令，并根据所述信号分发指令，从所述第一传输接口和所述第二传输接口中的至少一个发送与所述第一触摸坐标信号对应的第二触摸坐标信号。
  2. 如权利要求1所述的触控平板控制电路，其中，所述触摸转接模块包括第一微控制单元MCU；
    所述第一MCU设置为根据所述信号分发指令，判断是否输出所述第二触摸坐标信号。
  3. 根据权利要求2所述的触控平板控制电路，其中，所述第一MCU还设置为在确定输出所述第二触摸坐标信号的情况下，根据所述信号分发指令，从所述第一传输接口和所述第二传输接口中确定输出所述第二触摸坐标信号的接口。
  4. 如权利要求2或3所述的触控平板控制电路，其中，所述第一MCU还设置为根据所述信号分发指令，按照预设的坐标转换算法，将所述第一触摸坐标信号转换为第二触摸坐标信号。
  5. 如权利要求2、3或4所述的触控平板控制电路，其中，所述触摸转接模块还包括第一切换开关和集线器；
    所述第一切换开关包括第一控制端、第一输入端、第一输出端和第二输出端；所述集线器包括第一接入端、第二接入端和接出端；所述第一MCU包括输入设备连接端、切换开关连接端、主芯片连接端和信号源连接端；
    所述触摸转接模块还设置为从所述第一传输接口接收所述主芯片从所述触摸信息传输接口发送的支路切换指令；所述第一MCU的主芯片连接端连接所述 第一传输接口；所述第一MCU还设置为根据所述支路切换指令从所述切换开关连接端输出设定信号，所述切换开关连接端连接所述第一切换开关的第一控制端；
    所述第一切换开关设置为根据所述第一控制端接收到的所述设定信号确定所述第一输入端连接所述第一输出端或所述第二输出端；所述第一输入端连接所述触摸转接模块的输入接口；所述第一输出端连接所述集线器的第一接入端；所述第二输出端连接所述第一MCU的输入设备连接端，所述第一MCU的信号源连接端连接所述集线器的第二接入端，所述集线器的接出端连接所述触摸转接模块的第二传输接口。
  6. 如权利要求1至5任一项所述的触控平板控制电路，其中，所述触控平板控制电路包括多个信号源接口，还包括第二切换开关；所述第二切换开关包括第二输入端和多个第三输出端；
    所述第二切换开关连接于所述触摸转接模块的第二传输接口和所述多个信号源接口之间，其中，所述第二输入端连接所述第二传输接口，所述多个第三输出端与所述多个信号源接口一一对应连接。
  7. 如权利要求6所述的触控平板控制电路，还包括第二MCU；所述第二MCU包括第一扩展端、第二扩展端和第三扩展端；所述第二MCU连接于所述触摸转接模块的第一传输接口和所述主芯片的触摸信息传输接口之间，其中，所述第一扩展端连接所述第一传输接口，所述第二扩展端连接所述触摸信息传输接口；
    所述第二切换开关还包括第二控制端，所述第三扩展端设置为输出通道切换指令，所述第三扩展端连接所述第二控制端，所述第二切换开关设置为根据第二控制端接收到的所述通道切换指令确定所述第二输入端连接的第三输出端。
  8. 如权利要求7所述的触控平板控制电路，其中，所述第一扩展端和所述第一传输接口为通用异步收发传输器UART接口，所述第二扩展端和所述触摸信息传输接口为通用串行总线USB接口，所述第二输入端和所述第二传输接口为USB接口。
  9. 一种触控平板，包括触摸输入设备和如权利要求1至8任一项所述的触 控平板控制电路；
    所述触摸输入设备包括输出接口，所述输出接口连接所述触控平板控制电路中的触摸转接模块的输入接口。
  10. 如权利要求9所述的触控平板，其中，所述触摸输入设备为电容屏触摸框、红外触摸框或电磁屏。
PCT/CN2018/115965 2018-04-16 2018-11-16 触控平板控制电路和触控平板 WO2019200906A1 (zh)

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